Insert a standard belt drive

Any referenced datasets can be downloaded from "Module downloads" in the module overview.

Transcript

00:04

Let's use the standard belt to define the required pulleys.

00:08

Calculate the proper location of an idler based on the belt length and insert a portion of the detailed belt in a drawing.

00:16

Not all standardized components are as convenient as bearings or fasteners that come in uniform sizes.

00:23

Objects like belts come in specific length, but you have to be able to make them fit in your design.

00:31

With the chain and belt tools, an AutoCAD Mechanical,

00:35

we can place sprockets for chains or pulleys for belts that have their geometry defined by the type of chain or belt that will be applied.

00:48

As you would expect from AutoCAD mechanical, there are a broad variety of standards available to you.

00:54

You'll need to select the standard and the number of teeth that you need.

00:58

Placing it into the drawing, you'll be offered an opportunity to hide any objects or create hidden lines,

01:05

then we'll place the other sprocket.

01:08

Right now, of course, we're not exactly sure about how the spacing will work with the number of teeth that we need for this belt.

01:15

You can also do a function for calculating the number of teeth based on the sprocket spacing you need.

01:28

Once the pulleys are in place, AutoCAD mechanical makes it easy to define the path of the belt.

01:34

For this drawing, we have the two pulleys, but we also have an idler that's put in place.

01:47

Selecting the belt with the number of teeth and the length that we need,

01:52

We'll tell it to automatically calculate how the idler needs to be positioned for this belt to fit in the design.

02:16

After the path has been established,

02:18

you can set the objects that need to be rotated and the center point and it will adjust the idler to fit a belt size that you can purchase.

02:31

And returning more to the craft of drafting,

02:33

we want to make it easier for people to understand what type of object is in the drawing.

02:42

Selecting a position to start and establishing a number of teeth you want to add to the belt, it will go ahead and draw this in.

02:49

Skipping the process of having to create any sort of block for the belt and using an array tool to try and go around this complex curvature.

03:05

AutoCAD Mechanical does a phenomenal job of combining the convenience of being able to leverage standards,

03:10

and the drafting tools you need to present these objects in a way that people can easily understand.

Video transcript

00:04

Let's use the standard belt to define the required pulleys.

00:08

Calculate the proper location of an idler based on the belt length and insert a portion of the detailed belt in a drawing.

00:16

Not all standardized components are as convenient as bearings or fasteners that come in uniform sizes.

00:23

Objects like belts come in specific length, but you have to be able to make them fit in your design.

00:31

With the chain and belt tools, an AutoCAD Mechanical,

00:35

we can place sprockets for chains or pulleys for belts that have their geometry defined by the type of chain or belt that will be applied.

00:48

As you would expect from AutoCAD mechanical, there are a broad variety of standards available to you.

00:54

You'll need to select the standard and the number of teeth that you need.

00:58

Placing it into the drawing, you'll be offered an opportunity to hide any objects or create hidden lines,

01:05

then we'll place the other sprocket.

01:08

Right now, of course, we're not exactly sure about how the spacing will work with the number of teeth that we need for this belt.

01:15

You can also do a function for calculating the number of teeth based on the sprocket spacing you need.

01:28

Once the pulleys are in place, AutoCAD mechanical makes it easy to define the path of the belt.

01:34

For this drawing, we have the two pulleys, but we also have an idler that's put in place.

01:47

Selecting the belt with the number of teeth and the length that we need,

01:52

We'll tell it to automatically calculate how the idler needs to be positioned for this belt to fit in the design.

02:16

After the path has been established,

02:18

you can set the objects that need to be rotated and the center point and it will adjust the idler to fit a belt size that you can purchase.

02:31

And returning more to the craft of drafting,

02:33

we want to make it easier for people to understand what type of object is in the drawing.

02:42

Selecting a position to start and establishing a number of teeth you want to add to the belt, it will go ahead and draw this in.

02:49

Skipping the process of having to create any sort of block for the belt and using an array tool to try and go around this complex curvature.

03:05

AutoCAD Mechanical does a phenomenal job of combining the convenience of being able to leverage standards,

03:10

and the drafting tools you need to present these objects in a way that people can easily understand.

Insert a belt drive - Exercise

From the project files, open Belt Driven Gear Reducer 3.dwg.
In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Sprocket/Pulley.
In the Select Pulley and Sprocket dialog box, select Pulleys>Synchronous Belt pulley.
To place the pulley in the drawing, at the Specify center of wheel prompt, select the center of the top circle, as shown below.
At the Specify rotation angle prompt, press <Enter> to accept the default value of 0, as shown below.
In the Synchronous Belt pulley dialog box, on the Size tab, select H 075 24 from the Size x No. of teeth list and click Next.
On the Geometry tab, set the Number of Visible Teeth to 3 and the Shaft Diameter to .5, then click Finish.
In the Hide Situation dialog box, verify that Display hidden lines is unchecked, as shown below, and click OK.
In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Sprocket/Pulley.
In the Select Pulley and Sprocket dialog box, select Synchronous Belt pulley.
To place the pulley in the drawing, at the Specify center of wheel prompt, select the center point of the circle of HOLE 5:1 of the FRONT view of the STAND, as shown below.
At the Specify rotation angle prompt, accept the default value of 0.
In the Synchronous Belt pulley dialog box, on the Size tab, select H 075 48 from the Size x No. of teeth list and click Next.
On the Geometry tab, set the Number of Visible Teeth to 3 and the Shaft Diameter to .75, then click Finish.
In the Hide Situation dialog box, verify that Display hidden lines is unchecked and click OK.
In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Length Calculation.
In the Belt and Chain Length Calculation dialog box, ensure the New Tangent Definition between Sprocket/Pulley option is checked and the Belt option is selected, then click Library…
In the Select a Belt dialog box, select Synchronous belt.
In the Select Part Size dialog box, select the row with Belt length = 33, Thread Run-out = 0.16, Standard = 330H075 – ANSI/RMP IP-24, and Description = Synchronous belt (as shown below), and click OK.
In the Belt and Chain Length Calculation dialog box, select Auto.Optimization and Rotation. Check the checkboxes for Sprocket/Pulley for Move/Rotation and Center Point for Rotation and click OK.
For the first belt section, at the Specify 1st point for tangent prompt, select the upper-left quadrant of PULLEY 1:1 that you inserted earlier, as shown below.
For the first belt section, at the Specify 2nd point for tangent prompt, select the upper-left quadrant of PULLEY 2:1 that you inserted earlier, as shown below.
For the second belt section, at the Specify 1st point for tangent prompt, select the upper-right quadrant of PULLEY 2:1, as shown below.
For the second belt section, at the Specify 2nd point for tangent prompt, select the lower-left quadrant of the BELT DRIVE:1, as shown below.
For the third belt section, at the Specify 1st point for tangent prompt, select the upper-left quadrant of the BELT DRIVE:1, as shown below.
For the third belt section, at the Specify 2nd point for tangent prompt, select the lower-left quadrant of the PULLEY 1:1, as shown below.
With all three sections of the belt placed in the drawing, at the Specify 1st point for tangent prompt, right-click the mouse.
At the Select pulleys or sprockets to be moved. Select objects prompt, select the two circles of BELT DRIVE:1, as shown below.
To complete the task of selecting objects to be moved, right-click the mouse.
At the Specify pivot point prompt, select the intersection of the two centerlines of HEX FLANGE SCREW – REGULAR THREAD – INCH 1:1, as shown below.
If returned to the Belt and Chain Length Calculation dialog box, click Cancel to exit.
In the Content tab>Calculation panel, click the drop-down arrow next to Chains/Belts and select Chain/Belt Links.
In the Select Belt and Chain dialog box, select Belts.
At the Select polyline prompt, select the top of the red polyline that represents the belt length that was just added, as shown below.
At the Select starting point on polyline prompt, select the intersection of the top of the red polyline that represents the belt length and the vertical centerline, as shown below.
In the BELTS dialog box, on the Size tab, ensure the 330H075 – ANSI/RMP IP-24 size is selected and click Next.
On the Geometry tab, change the Number of Links to Draw to 50, then click Finish.
At the Specify Direction of Links prompt, if the blue direction arrow is pointing to the left, choose the Flip option, as shown below.
At the Specify Direction of Links prompt, if the blue direction arrow is pointing to the right, choose the Accept option, as shown below.
At the Specify Orientation of Links prompt, and with the blue arrow pointing down, choose the Accept option, as shown in the image below.
In the Hide Situation dialog box, verify that the Display hidden lines option is unchecked, then click OK.
Save the drawing.

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Insert a standard belt drive

Insert a belt drive - Exercise

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